'Thor' premiere

Chris Hemsworth, who stars as the title character in "Thor," arrives at the film's world premiere at Event Cinemas George Street in Sydney, Australia, on April 17, 2011.

Chris Hemsworth, who stars as the title character in "Thor," arrives at the film's world premiere at Event Cinemas George Street in Sydney, Australia, on April 17, 2011. (Brendon Thorne / Getty Images)

Chris Hemsworth, who stars as the title character in "Thor," arrives at the film's world premiere at Event Cinemas George Street in Sydney, Australia, on April 17, 2011.